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1.
Indian J Pharmacol ; 56(2): 120-128, 2024 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-38687316

RESUMEN

OBJECTIVE: The objective of this study was to evaluate the efficacy and safety of topical nanoemulsion (NE)-loaded cream and gel formulations of Hippophae rhamnoides L. (sea buckthorn [SBT]) fruit oil for wound healing. MATERIALS AND METHODS: The NE-loaded cream and gel formulations of H. rhamnoides L. (SBT) fruit oil (IPHRFH) were prepared and evaluated for their wound-healing activity on female Sprague-Dawley (SD) rats. They were further divided into groups (seven) and the wound-healing activity was determined by measuring the area of the wound on the wounding day and on the 0th, 4th, 8th, and 10th days. The acute dermal toxicity of the formulations was assessed by observing the erythema, edema, and body weight (BW) of the rats. RESULTS: The topical NE cream and gel formulations of H. rhamnoides L. (SBT) fruit oil showed significant wound-healing activity in female SD rats. The cream formulation of IPHRFH showed 78.96%, the gel showed 72.59% wound contraction on the 8th day, whereas the positive control soframycin (1% w/w framycetin) had 62.29% wound contraction on the 8th day. The formulations also showed a good acute dermal toxicity profile with no changes significantly affecting BW and dermal alterations. CONCLUSIONS: The results of this study indicate that topical NE-loaded cream and gel formulation of H. rhamnoides L. (SBT) fruit oil are safe and effective for wound healing. The formulations showed no signs of acute dermal toxicity in female SD rats.


Asunto(s)
Emulsiones , Geles , Hippophae , Aceites de Plantas , Ratas Sprague-Dawley , Cicatrización de Heridas , Animales , Femenino , Hippophae/química , Hippophae/toxicidad , Cicatrización de Heridas/efectos de los fármacos , Ratas , Aceites de Plantas/toxicidad , Aceites de Plantas/administración & dosificación , Frutas , Piel/efectos de los fármacos , Administración Cutánea , Administración Tópica , Nanopartículas/toxicidad
2.
Nat Prod Res ; : 1-6, 2022 Nov 29.
Artículo en Inglés | MEDLINE | ID: mdl-36445311

RESUMEN

A new HPLC-PDA method was developed and validated for simultaneous determination of five phenolic compounds (trans-and cis- isomers of tiliroside, quercetin-3-O-ß-D-glucoside, ellagic acid, kaempferol-3-O-ß-D-glucoside and isorhamnetin-3-O-glucoside) in the leaves of Hippophae salicifolia D. Don. Of the five compounds, three (tiliroside, quercetin-3-O-ß-D-glucoside and ellagic acid) were isolated and characterised by spectroscopy techniques. The developed HPLC method provided a selective, sensitive and rapid analysis with good linearity (r2> 0.999), accuracy and precision. Also, the leaves of H. salicifolia were extracted by three different extraction techniques viz. reflux, microwave and ultrasound. Methanolic extracts prepared by reflux method showed the highest content of all the five compounds.

3.
J Ethnopharmacol ; 297: 115539, 2022 Oct 28.
Artículo en Inglés | MEDLINE | ID: mdl-35843412

RESUMEN

ETHNO-PHARMACOLOGICAL RELEVANCE: Gymnosporia montana (Roth) Benth an herbaceous shrub used in Indian traditional medicine their leaves decoction was used as mouthwash to get relieve from toothache, hence it is also known as Dantakashta in Sanskrit language which means the plant used for tooth problems. Traditionally the leaves juice used to alleviate inflammation and in some parts of India like Saurashtra in Gujarat, leaves were chewed as a folklore cure for Jaundice and in Bhandra region Karnataka, leaves extract mixed with cow milk used for jaundice. Hepatoprotective activity for G. montana leaves was well reported however, its use for inflammation and toothache are still not studied to investigate active phytoconstituents responsible for anti-inflammatory activity. AIM OF THE STUDY: The present study aimed at bioactivity guided isolation of G. montana leaves extracts using inhibition of pro-inflammatory mediators such as nitric oxide (NO), tumor necrosis factor (TNF-α), and interleukins (IL-1ß and IL-6) in RAW 264.7 cells in vitro assay to yield bioactive phytoconstituents. MATERIALS AND METHODS: The n-hexane, ethyl acetate and methanol extracts prepared from G. montana leaves were evaluated for cell viability using MTT assay. The effect of extracts to inhibit the pro-inflammatory mediators like NO, TNF-α, IL-1ß and IL-6 in RAW 264.7 macrophages was measured by enzyme-linked immunosorbent assay (ELISA). The quantitative analysis of the isolated phytoconstituents was performed using quantitative Nuclear Magnetic Resonance (qNMR). RESULTS: The n-hexane, ethyl acetate, and methanol extracts of G. montana leaves exhibited cell viability in the range of 97.43-84.88% at 50 µg/mL concentration in RAW 264.7 macrophages. In-vitro evaluation of extracts showed that n-hexane extract was most effective in inhibiting NO, TNF-α, IL-1ß and IL-6 inflammatory mediators at 50 µg/mL in lipopolysaccharides (LPS) stimulated RAW 264.7 cells. Further n-hexane extract, its fraction GMHA3 and ß-amyrin exhibited significant anti-inflammatory activity at 100, 50 and 30 mg/kg per oral, respectively in carrageenan-induced rat paw edema. The quantitative analysis by qNMR revealed ß-amyrin as a major compound in the n-hexane extract. CONCLUSIONS: In vitro and in vivo bioassay results suggested that G. montana n-hexane extract, its fraction GMHA3 and ß-amyrin exhibits significant anti-inflammatory activity proves the traditional uses of G. montana leaves. The reported activity of ß-amyrin for periodontitis provides evidence of profound the use of G. montana leaves for toothache and anti-inflammatory activity.


Asunto(s)
Interleucina-6 , Factor de Necrosis Tumoral alfa , Animales , Antiinflamatorios/química , Antiinflamatorios/farmacología , Antiinflamatorios/uso terapéutico , Bovinos , Edema/tratamiento farmacológico , Femenino , India , Inflamación/tratamiento farmacológico , Mediadores de Inflamación , Lipopolisacáridos , Metanol/uso terapéutico , Montana , Óxido Nítrico , Extractos Vegetales/química , Extractos Vegetales/farmacología , Extractos Vegetales/uso terapéutico , Ratas , Odontalgia
4.
Drug Des Devel Ther ; 15: 385-397, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33574657

RESUMEN

INTRODUCTION: Oleanolic acid, a pentacyclic triterpenic acid, is widely distributed in medicinal plants and is the most commonly studied triterpene for various biological activities, including anti-allergic, anti-cancer, and anti-inflammatory. METHODS: The present study was carried out to synthesize arylidene derivatives of oleanolic acid at the C-2 position by Claisen Schmidt condensation to develop more effective anti-inflammatory agents. The derivatives were screened for anti-inflammatory activity by scrutinizing NO production inhibition in RAW 264.7 cells induced by LPS and their cytotoxicity. The potential candidates were further screened for inhibition of LPS-induced interleukin (IL-6) and tumour necrosis factor-alpha (TNF-α) production in RAW 264.7 cells. RESULTS: The results of in vitro studies revealed that derivatives 3d, 3e, 3L, and 3o are comparable to that of the oleanolic acid on the inhibition of TNF-α and IL-6 release. However, derivative 3L was identified as the most potent inhibitor of IL-6 (77.2%) and TNF-α (75.4%) when compared to parent compound, and compounds 3a (77.18%), 3d (71.5%), and 3e (68.8%) showed potent inhibition of NO than oleanolic acid (65.22%) at 10µM. Besides, from docking score and Cyscore analysis analogs (3e, 3L, 3n) showed greater affinity towards TNF-α and IL-1ß than dexamethasone. CONCLUSION: Herein, we report a series of 15 new arylidene derivatives of oleanolic acid by Claisen Schmidt condensation reaction. All the compounds synthesized were screened for their anti-inflammatory activity against NO, TNF-α and IL-6. From the data, it was evident that most of the compounds exhibited better anti-inflammatory activity.


Asunto(s)
Aldehídos/farmacología , Antiinflamatorios/farmacología , Diseño de Fármacos , Ácido Oleanólico/farmacología , Aldehídos/química , Animales , Antiinflamatorios/síntesis química , Antiinflamatorios/química , Supervivencia Celular/efectos de los fármacos , Citocinas/análisis , Citocinas/biosíntesis , Relación Dosis-Respuesta a Droga , Lipopolisacáridos/antagonistas & inhibidores , Lipopolisacáridos/farmacología , Ratones , Modelos Moleculares , Estructura Molecular , Óxido Nítrico/antagonistas & inhibidores , Óxido Nítrico/biosíntesis , Ácido Oleanólico/química , Células RAW 264.7 , Relación Estructura-Actividad
5.
Curr Med Chem ; 28(23): 4799-4825, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-32744957

RESUMEN

Alzheimer's disease (AD) is a chronic neurodegenerative brain disorder characterized by memory impairment, dementia, and oxidative stress in elderly people. Currently, only a few drugs are available in the market with various adverse effects. Therefore, to develop new drugs with protective action against the disease, research is turning to the identification of plant products as a remedy. Natural compounds with anti-inflammatory activity could be good candidates for developing effective therapeutic strategies. Phytochemicals, including Curcumin, Resveratrol, Quercetin, Huperzine-A, Rosmarinic acid, genistein, obovatol, and Oxyresvertarol, were reported molecules for the treatment of AD. Several alkaloids, such as galantamine, oridonin, glaucocalyxin B, tetrandrine, berberine and anatabine, have been shown anti-inflammatory effects in AD models in vitro as well as in-vivo. In conclusion, natural products from plants represent interesting candidates for the treatment of AD. This review highlights the potential of specific compounds from natural products along with their synthetic derivatives to counteract AD in the CNS.


Asunto(s)
Enfermedad de Alzheimer , Productos Biológicos , Preparaciones Farmacéuticas , Anciano , Enfermedad de Alzheimer/tratamiento farmacológico , Antiinflamatorios/farmacología , Antiinflamatorios/uso terapéutico , Productos Biológicos/farmacología , Productos Biológicos/uso terapéutico , Humanos , Fitoquímicos/uso terapéutico
6.
Med Chem ; 17(9): 983-993, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-32885758

RESUMEN

BACKGROUND: Inflammation involves a dynamic network that is highly regulated by signals that initiate the inflammation process as well as signals that downregulate it. However, an imbalance between the two leads to tissue damage. Throughout the world, inflammatory disease becomes common in the aging society. The drugs which are used clinically have serious side effects. Natural products or compounds derived from natural products show diversity in structure and play an important role in drug discovery and development. OBJECTIVE: Oreganum Vulgare is used in traditional medicine for various ailments including respiratory and rheumatic disorders, severe cold, suppression of tumors. The current study aims to evaluate the anti-inflammatory potential by evaluating various in vitro parameters. METHODS: Inflammation-induced in macrophages via LPS is the most accepted model for evaluating the antiinflammatory activity of various plant extracts and lead compounds. RESULTS: The extracts (OVEE, OVEAF) as well as the isolated compound(OVRA)of Oreganum Vulgare inhibit the pro-inflammatory cytokines (IL-6 and TNF-α) and NO without affecting cell viability. CONCLUSION: Our study established that the leaf extracts of Oreganum vulgare L. exhibit anti-inflammatory activity and thus confirm its importance in traditional medicine.


Asunto(s)
Antiinflamatorios/farmacología , Antioxidantes/farmacología , Origanum/química , Animales , Antiinflamatorios/química , Antioxidantes/química , Supervivencia Celular/efectos de los fármacos , Cinamatos/química , Cinamatos/metabolismo , Citocinas/metabolismo , Depsidos/química , Depsidos/metabolismo , Dexametasona/química , Dexametasona/metabolismo , Evaluación Preclínica de Medicamentos , Interleucina-1beta/química , Interleucina-1beta/metabolismo , Lipopolisacáridos/farmacología , Ratones , Simulación del Acoplamiento Molecular , Óxido Nítrico/metabolismo , Extractos Vegetales/química , Extractos Vegetales/farmacología , Hojas de la Planta/química , Células RAW 264.7 , Factor de Necrosis Tumoral alfa/química , Factor de Necrosis Tumoral alfa/metabolismo , Ácido Rosmarínico
7.
Curr Med Chem ; 28(10): 1877-1905, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-32484764

RESUMEN

BACKGROUND: Several clinically used COX-1 and COX-2 inhibitor drugs were reported to possess severe side effects like GI ulcers and cardiovascular disturbances, respectively. Natural products being structurally diverse always attracted the attention of chemists/ medicinal chemists as a potential source of lead molecules in the drug discovery process. COX-2 inhibitory natural products also possess potential cancer chemopreventive property against various cancers including that of colon, breast and prostate. METHODS: Various in vitro, in vivo and in silico standardized methods were used to evaluate COX inhibition property of different secondary metabolites isolated from plant, microbial and marine origin. RESULTS: We had earlier reported a detailed account of natural product inhibitors of COX reported during 1995-2005, in 2006. In the proposed review, we report 158 natural product inhibitors of COX during 2006 to 2019 belonging to various secondary metabolite classes such as alkaloids, terpenoids, polyphenols as flavonoids, chromones, coumarins, lignans, anthraquinones, naphthalenes, curcuminoids, diarylheptanoids and miscellaneous compounds of plant and marine origin. Further Structure Activity Relationship (SAR) studies of possible leads are also included in the article. CONCLUSION: COX inhibitors served as a potential source of lead molecules for the discovery and development of anti-inflammatory drugs. Compilation of natural product and semisynthetic inhibitors of COX may serve as valuable information to the researchers who are looking for possible lead molecules from a natural source to conduct further preclinical and clinical studies.


Asunto(s)
Productos Biológicos , Inhibidores de la Ciclooxigenasa 2 , Productos Biológicos/farmacología , Ciclooxigenasa 1 , Ciclooxigenasa 2/metabolismo , Inhibidores de la Ciclooxigenasa 2/farmacología , Descubrimiento de Drogas , Humanos , Relación Estructura-Actividad
8.
Bioorg Chem ; 104: 104225, 2020 11.
Artículo en Inglés | MEDLINE | ID: mdl-32992278

RESUMEN

The NorA efflux pump decreases the intracellular concentration of fluoroquinolones (ciprofloxacin, norfloxacin) by effluxing them from Staphylococcus aureus cells. The synthesis of novel acrylohydrazide derivatives was achieved using well-known reactions and were characterized by various spectroscopy techniques. The synthesized 50 compounds were evaluated for the NorA efflux pump inhibition activity against S. aureus SA-1199B (norA++) and K1758 (norA-) strains. The study provided two most active compounds viz. 19 and 52. Compound 19 was found to be most active in potentiating effect of norfloxacin and also it showed enhanced uptake, efflux inhibition in ethidium bromide assay. Further compound 19 also enhanced post antibiotic effect and reduced mutation prevention concentration of norfloxacin. The homology modeling study was performed to elucidate three-dimensional structure of NorA. Docking studies of potent molecules were done to find the binding affinity and interaction with active site residues. Further, all the tested compounds exhibited good ADME and drug-likeness properties in- silico. Based on the in-silico studies and detailed in vitro studies, acrylohydrazides derivatives may be considered as potential NorA EPI candidates.


Asunto(s)
Antibacterianos/farmacología , Proteínas Bacterianas/antagonistas & inhibidores , Teoría Funcional de la Densidad , Hidrazinas/farmacología , Proteínas Asociadas a Resistencia a Múltiples Medicamentos/antagonistas & inhibidores , Staphylococcus aureus/efectos de los fármacos , Antibacterianos/síntesis química , Antibacterianos/química , Proteínas Bacterianas/metabolismo , Relación Dosis-Respuesta a Droga , Hidrazinas/síntesis química , Hidrazinas/química , Pruebas de Sensibilidad Microbiana , Modelos Moleculares , Estructura Molecular , Proteínas Asociadas a Resistencia a Múltiples Medicamentos/metabolismo , Relación Estructura-Actividad
9.
Environ Sci Pollut Res Int ; 27(36): 44724-44742, 2020 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-32715424

RESUMEN

Neurodegenerative disorders are commonly erratic influenced by various factors including lifestyle, environmental, and genetic factors. In recent observations, it has been hypothesized that exposure to various environmental factors enhances the risk of Alzheimer's disease (AD). The exact etiology of Alzheimer's disease is still unclear; however, the contribution of environmental factors in the pathology of AD is widely acknowledged. Based on the available literature, the review aims to culminate in the prospective correlation between the various environmental factors and AD. The prolonged exposure to the various well-known environmental factors including heavy metals, air pollutants (particulate matter), pesticides, nanoparticles containing metals, industrial chemicals results in accelerating the progression of AD. Common mechanisms have been documented in the field of environmental contaminants for enhancing amyloid-ß (Aß) peptide along with tau phosphorylation, resulting in the initiation of senile plaques and neurofibrillary tangles, which results in the death of neurons. This review offers a compilation of available data to support the long-suspected correlation between environmental risk factors and AD pathology. Graphical abstract .


Asunto(s)
Enfermedad de Alzheimer , Contaminantes Ambientales , Enfermedad de Alzheimer/inducido químicamente , Péptidos beta-Amiloides/metabolismo , Encéfalo/metabolismo , Humanos , Neuronas/metabolismo , Estudios Prospectivos
10.
Arch Pharm (Weinheim) ; 353(8): e2000077, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32484273

RESUMEN

Pyrazole, coumarin, and quinoline are medicinally important moieties. In this study, two series of novel pyrazole-coumarin chalcones and pyrazole-quinoline chalcones were synthesized using multiple-step reactions. All the synthesized compounds were well characterized using different spectroscopic techniques including 1 H and 13 C nuclear magnetic resonance, high-resolution mass spectroscopy, and electrospray ionization-mass spectrometry. The compounds were evaluated for their antitubercular activity against the Mycobacterium tuberculosis H37Rv strain using the microplate Alamar Blue assay, and the minimal inhibitory concentrations (MIC) of the compounds were determined. Among the 32 tested compounds, compounds 3e, 3u, and 7h showed an MIC value of 3.125 µg/ml, and they were found to be nontoxic. Molecular docking studies of the compounds with the enzyme DprE1 revealed the probable mechanism of action. The chalcone derivatives exhibited binding affinity values between -7.047 and -9.353 kcal/mol. ADME parameters were predicted using the QikProp module of the Schrödinger software, and these compounds exhibited good pharmacological and oral absorption properties.


Asunto(s)
Antituberculosos/farmacología , Chalconas/farmacología , Cumarinas/farmacología , Mycobacterium tuberculosis/efectos de los fármacos , Pirazoles/farmacología , Quinolinas/farmacología , Antituberculosos/síntesis química , Antituberculosos/química , Chalconas/síntesis química , Chalconas/química , Cumarinas/síntesis química , Cumarinas/química , Pruebas de Sensibilidad Microbiana , Simulación del Acoplamiento Molecular , Estructura Molecular , Pirazoles/síntesis química , Pirazoles/química , Quinolinas/síntesis química , Quinolinas/química , Programas Informáticos
11.
Chem Biodivers ; 17(8): e2000144, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32449250

RESUMEN

MsrA, an efflux pump belonging to ATP-binding cassette (ABC) transporter family that conferred resistance to macrolides, was detected in Staphylococcus aureus strains. Herein, we report the isolation of phytoconstituents from Piper cubeba fruit methanol extract and investigated their efflux pump inhibitory potential against S. aureus MsrA pump. Four isolated compounds, viz. pellitorine, sesamin, piperic acid and tetrahydropiperine studied in combination with erythromycin in S. aureus RN4220, exhibited 2-8-fold reduction in minimum inhibitory concentration (MIC) of erythromycin. Pellitorine and sesamin decreased MIC of erythromycin by 8-fold. The real-time fluorometry-based efflux and accumulation studies of ethidium bromide (EtBr) on S. aureus RN4220 in the presence of these compounds showed reduced efflux and enhanced uptake, thus indicating inhibition of the efflux pump. Pellitorine showed significant post-antibiotic effect of erythromycin. The results revealed that the primary mechanism of action of these compounds involves steady ATP production impairment.


Asunto(s)
Proteínas Bacterianas/antagonistas & inhibidores , Lignanos/farmacología , Proteínas de Transporte de Membrana/efectos de los fármacos , Piper/química , Extractos Vegetales/farmacología , Staphylococcus aureus/efectos de los fármacos , Animales , Espectroscopía de Resonancia Magnética con Carbono-13 , Línea Celular , Cromatografía Líquida de Alta Presión , Humanos , Espectrometría de Masas , Ratones , Pruebas de Sensibilidad Microbiana , Espectroscopía de Protones por Resonancia Magnética
12.
Front Microbiol ; 10: 1728, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31417521

RESUMEN

Natural evolution in microbes exposed to antibiotics causes inevitable selection of resistant mutants. This turns out to be a vicious cycle which requires the continuous discovery of new and effective antibiotics. For the last six decades, we have been relying on semisynthetic derivatives of natural products discovered in "Golden Era" from microbes, especially Streptomyces sp. Low success rates of rational drug-design sparked a resurgence in the invention of novel natural products or scaffolds from untapped or uncommon microbial niches. Therefore, in this study, we examined the microbial diversity inhabiting the yak milk for their ability to produce antimicrobial compounds. We prepared the crude fermentation extracts of fifty isolates from yak milk and screened them against indicator strains for the inhibitory activity. Later, with the aid of gel filtration chromatography followed by reversed-phase HPLC, we isolated one antimicrobial compound Y5-P1 from the strain Y5 (Pseudomonas koreensis) which showed bioactivity against Gram-positive and Gram-negative bacteria. The compound was chemically characterized using HRMS, FTIR, and NMR spectroscopy and identified as 1-acetyl-9H-ß-carboline-3-carboxylic acid. It showed minimum inhibitory activity (MIC) in the range of 62.5-250 µg /ml. The cytotoxicity results revealed that IC50 against two mammalian cell lines i.e., HepG2 and HEK293T was 500 and 750 µg/ml, respectively. This is the first report on the production of this derivative of ß-carboline by the microorganism. Also, the study enlightens the importance of microbes residing in uncommon environments or unexplored habitats in the discovery of a diverse array of natural products which could be designed further as drug candidates against highly resistant pathogens.

13.
Eur J Med Chem ; 157: 1-13, 2018 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-30064024

RESUMEN

Sodium trifluoromethanesulfonate, and glacial acetic acid selectively catalyzed the synthesis of dihydroquinoline via Friedländer annulation. The synthesized dihydroquinoline analogues coupled with different amines by the use of coupling reagent gave dihydroquinoline carboxamide derivatives in moderate to good yields. All the synthesized novel compounds were evaluated for the anti-tubercular activity and cytotoxic activities in vitro. Among tested 30 compounds, two compounds, 8g and 8h showed MIC value of 0.39 and 0.78 µg/mL, respectively against Mycobacterium tuberculosis H37Rv and they were found to be non-toxic. Also these two compounds exhibited good pharmacological properties and oral absorption when studied using in-silico models.


Asunto(s)
Antituberculosos/farmacología , Mycobacterium tuberculosis/efectos de los fármacos , Quinolinas/farmacología , Animales , Antituberculosos/síntesis química , Antituberculosos/química , Supervivencia Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Ratones , Pruebas de Sensibilidad Microbiana , Estructura Molecular , Quinolinas/síntesis química , Quinolinas/química , Células RAW 264.7 , Relación Estructura-Actividad
14.
Eur J Med Chem ; 156: 871-884, 2018 Aug 05.
Artículo en Inglés | MEDLINE | ID: mdl-30056283

RESUMEN

A novel series of furan/thiophene carbohydrazides and carboxamides were synthesized and evaluated for anti-TB and cytotoxic activities. All the synthesized compounds were characterized using 1H and 13C NMR and mass spectral techniques. Among the 23 compounds tested for anti-tubercular activity, seven compounds (3e, 3g, 3h, 9b, 9c, 9e and 9h) showed minimum inhibitory concentration value less than 1 µg/mL against Mycobacterium tuberculosis H37Rv and they were found to be non-toxic. Molecular docking and dynamics simulation studies of these compounds with an enzyme enoyl ACP reductase revealed the probable mechanism of action, which is similar to isoniazid. Further, all these tested compounds exhibited good absorption, distribution, metabolism and excretion and drug-likeness in-silico and thus may be considered as potential leads for further drug development.


Asunto(s)
Antituberculosos/química , Antituberculosos/farmacología , Hidrazinas/química , Hidrazinas/farmacología , Mycobacterium tuberculosis/efectos de los fármacos , Células CACO-2 , Diseño de Fármacos , Células HEK293 , Humanos , Pruebas de Sensibilidad Microbiana , Simulación del Acoplamiento Molecular , Relación Estructura-Actividad , Tuberculosis/tratamiento farmacológico , Tuberculosis/microbiología
15.
J Pharm Pharmacol ; 68(10): 1331-9, 2016 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-27464528

RESUMEN

OBJECTIVES: This study aimed to investigate the anticancer potential of indigocarpan (1), a pterocarpan isolated from Indigofera aspalathoides, a plant found in India which has been used in Ayurveda for centuries for the treatment of oedematous tumours. METHODS: The antiproliferative activity in a panel of four human cancer cell lines was studied. The mechanism of its antiproliferative activity in human colorectal adenocarcinoma LS174T cells was investigated in detail. KEY FINDINGS: Indigocarpan (1) showed antiproliferative activity in a panel of four human cancer cell lines with IC50 s ranging from 180 to 250 µm. Indigocarpan induces p53-dependent p21 upregulation and apoptosis in LS174T cells, upregulates p53 and p21(WAF1) protein levels, enhances cleavage of caspase-3 and downregulates cyclin D1, cyclin B1 and PCNA protein levels, indicating its role in modulating cell cycle progression. Indigocarpan also exhibited a strong antioxidative effect in LS174T cells. CONCLUSIONS: Along with the antiproliferative capacity, the strong antioxidative property of the compound makes it a promising candidate for further development as an anticancer and chemopreventive compound.


Asunto(s)
Antioxidantes/farmacología , Proliferación Celular/efectos de los fármacos , Indigofera/química , Extractos Vegetales/farmacología , Pterocarpanos/farmacología , Adenocarcinoma/tratamiento farmacológico , Adenocarcinoma/metabolismo , Apoptosis/efectos de los fármacos , Ciclo Celular/efectos de los fármacos , Proteínas de Ciclo Celular/metabolismo , Línea Celular Tumoral , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/metabolismo , Ciclina B1/metabolismo , Ciclina D1/metabolismo , Inhibidor p21 de las Quinasas Dependientes de la Ciclina/metabolismo , Regulación hacia Abajo/efectos de los fármacos , Humanos , India , Extractos Vegetales/química , Antígeno Nuclear de Célula en Proliferación/metabolismo , Proteína p53 Supresora de Tumor/metabolismo , Regulación hacia Arriba/efectos de los fármacos
16.
Bioorg Med Chem Lett ; 25(9): 1952-5, 2015 May 01.
Artículo en Inglés | MEDLINE | ID: mdl-25824662

RESUMEN

2'-Hydroxy flavanone (1) was previously isolated from Mimosa pudica (L.) whole plant and was found to exhibit anti-inflammatory effects in vitro. There are also reports on anti-inflammatory properties of compounds bearing flavanone/chromone nucleus. Taking this into account, fourteen derivatives of 2'-hydroxy flavanone (1) were synthesized and evaluated against pro-inflammatory mediators (TNF-α, IL-1ß and NO) in in vitro and in vivo models. Results directed that among the synthesized compounds, four derivatives (11-14) showed profound inhibition of pro-inflammatory mediators as compared to the lead molecule. Further, 11-14 demonstrated comparable anti-inflammatory activity with ibuprofen in carrageenan-induced rat paw edema assay and appreciable inhibition of lipopolysaccharide (LPS) induced pro-inflammatory mediators (TNF-α and IL-1ß) in Sprague Dawley (SD) rats. The synthesized compounds were further subjected to molecular docking analysis and in silico prediction of pharmacokinetic properties.


Asunto(s)
Flavanonas/farmacología , Interleucina-1alfa/antagonistas & inhibidores , Mimosa/química , Simulación del Acoplamiento Molecular , Óxido Nítrico/antagonistas & inhibidores , Extractos Vegetales/farmacología , Factor de Necrosis Tumoral alfa/antagonistas & inhibidores , Animales , Línea Celular , Supervivencia Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Edema/tratamiento farmacológico , Flavanonas/química , Flavanonas/aislamiento & purificación , Inflamación/tratamiento farmacológico , Interleucina-1alfa/metabolismo , Lipopolisacáridos/antagonistas & inhibidores , Lipopolisacáridos/farmacología , Ratones , Estructura Molecular , Óxido Nítrico/biosíntesis , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Ratas , Ratas Sprague-Dawley , Relación Estructura-Actividad , Factor de Necrosis Tumoral alfa/metabolismo
17.
Bioorg Med Chem Lett ; 24(19): 4638-4642, 2014 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-25219899

RESUMEN

As a part of our continued efforts to discover new COX inhibitors, a series of 3-methyl-1-phenylchromeno[4,3-c]pyrazol-4(1H)-ones were synthesized and evaluated for in vitro COX inhibitory potential. Within this series, seven compounds (3a-d, 3h, 3k and 3q) were identified as potential and selective COX-2 inhibitors (COX-2 IC50's in 1.79-4.35µM range; COX-2 selectivity index (SI)=6.8-16.7 range). Compound 3b emerged as most potent (COX-2 IC50=1.79µM; COX-1 IC50 >30µM) and selective COX-2 inhibitor (SI >16.7). Further, compound 3b displayed superior anti-inflammatory activity (59.86% inhibition of edema at 5h) in comparison to celecoxib (51.44% inhibition of edema at 5h) in carrageenan-induced rat paw edema assay. Structure-activity relationship studies suggested that N-phenyl ring substituted with p-CF3 substituent (3b, 3k and 3q) leads to more selective inhibition of COX-2. To corroborate obtained experimental biological data, molecular docking study was carried out which revealed that compound 3b showed stronger binding interaction with COX-2 as compared to COX-1.


Asunto(s)
Antiinflamatorios no Esteroideos/farmacología , Cumarinas/farmacología , Inhibidores de la Ciclooxigenasa 2/farmacología , Ciclooxigenasa 2/metabolismo , Edema/tratamiento farmacológico , Simulación del Acoplamiento Molecular , Pirazoles/farmacología , Animales , Antiinflamatorios no Esteroideos/síntesis química , Antiinflamatorios no Esteroideos/química , Carragenina , Cumarinas/síntesis química , Cumarinas/química , Inhibidores de la Ciclooxigenasa 2/síntesis química , Inhibidores de la Ciclooxigenasa 2/química , Relación Dosis-Respuesta a Droga , Edema/inducido químicamente , Estructura Molecular , Pirazoles/síntesis química , Pirazoles/química , Ratas , Ovinos , Relación Estructura-Actividad
18.
Nat Prod Commun ; 9(8): 1139-41, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25233592

RESUMEN

A new briarane-type diterpenoid, named 2-acetoxyverecynarmin C, was isolated from the methanolic extract of an octocoral, Pennatula aculeata, that exhibited cyclooxygenase (COX) inhibitory activity. The structure of the compound was elucidated by ESI-HRMS, 1D and 2D NMR spectroscopy and comparison of the measured spectral data with those reported in the literature. The relative stereochemistry at chiral carbons was established from 2D NOESY experiments. 2-Acetoxyverecynarmin C is a tricyclic compound containing a furan ring at C-7,8 of a briarane skeleton. 2-Acetoxyverecynarmin C showed moderate inhibitory activity in in vitro COX-1 and COX-2 assays.


Asunto(s)
Antozoos/química , Inhibidores de la Ciclooxigenasa/química , Diterpenos/química , Animales , Estructura Molecular , Prostaglandina-Endoperóxido Sintasas/análisis
19.
Biomed Res Int ; 2014: 808302, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24949473

RESUMEN

UNLABELLED: Boerhavia diffusa (BD) is a plant of rasayana category as per ayurvedic claims. It is reported to possess antiaging, disease prevention, and life strengthening activities which hold enormous influence in disease burden and affordability/availability of healthcare in the world. Objective. This paper has been compiled to comment on the studies reported for BD to highlight its chemical and therapeutic potential along with its ethnopharmacological considerations. METHODS: In the present paper, a detailed account of chemical constituents and pharmacological activities has been presented. All the findings were correlated with modern pharmacological activities to appraise the value of BD. RESULTS: Chemical analysis of BD gives a wide variety of chemical constituents, namely, rotenoids, flavonoids, xanthones, purine nucleoside, lignans, and steroids. Various ethnopharmacological reports emphasize its role in disorders of reproductive system, gastrointestinal system, respiratory system, urinary system, hepatic system/jaundice, cardiovascular system, and cancer. CONCLUSIONS: The studies on the therapeutic activities of BD range from studies on crude extracts to isolated compounds; however some of the studies require sophistication and validated results. BD is a plant of enormous importance in the purview of its chemical and therapeutic properties.


Asunto(s)
Medicina Ayurvédica , Nyctaginaceae/química , Extractos Vegetales/química , Humanos , Fitoquímicos/química , Fitoquímicos/uso terapéutico , Extractos Vegetales/uso terapéutico
20.
Eur J Med Chem ; 80: 47-56, 2014 Jun 10.
Artículo en Inglés | MEDLINE | ID: mdl-24763362

RESUMEN

Nepodin and chrysophanol, isolated from Rumex nepalensis roots, showed significant cyclooxygenase (COX) inhibitory activity. To further optimize these lead molecules and study structure activity relationship (SAR), eighteen derivatives of nepodin and nine derivatives of chrysophanol were synthesized and evaluated for COX-1 and COX-2 inhibitory potential. Among the synthesized compounds, four nepodin (1f, 1g, 1h and 1i) and three chrysophanol (2e, 2f and 2h) derivatives displayed more pronounced COX-2 inhibition than their respective lead molecule. Further, compounds 1f, 1g, 2e and 2h exhibited better anti-inflammatory activity than ibuprofen in carrageenan-induced rat paw edema assay. Taking into account the in vitro and in vivo results, molecular docking and in silico prediction of ADMET properties of compounds were carried out respectively.


Asunto(s)
Absorción Fisicoquímica , Antraquinonas/metabolismo , Antraquinonas/farmacología , Simulación del Acoplamiento Molecular , Naftalenos/metabolismo , Naftalenos/farmacología , Animales , Antraquinonas/síntesis química , Antraquinonas/química , Dominio Catalítico , Técnicas de Química Sintética , Ciclooxigenasa 1/química , Ciclooxigenasa 1/metabolismo , Ciclooxigenasa 2/química , Ciclooxigenasa 2/metabolismo , Inhibidores de la Ciclooxigenasa 2/síntesis química , Inhibidores de la Ciclooxigenasa 2/química , Inhibidores de la Ciclooxigenasa 2/metabolismo , Femenino , Concentración 50 Inhibidora , Naftalenos/síntesis química , Naftalenos/química , Ratas , Ratas Sprague-Dawley , Relación Estructura-Actividad
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